<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0120-2448</journal-id>
<journal-title><![CDATA[Acta Medica Colombiana]]></journal-title>
<abbrev-journal-title><![CDATA[Acta Med Colomb]]></abbrev-journal-title>
<issn>0120-2448</issn>
<publisher>
<publisher-name><![CDATA[Asociacion Colombiana de Medicina Interna]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-24482021000400018</article-id>
<article-id pub-id-type="doi">10.36104/amc.2021.2010</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Validity of the Pulmonary Embolism Rule-Out Criteria (PERC) for ruling out pulmonary embolism in low-risk patients at high altitudes]]></article-title>
<article-title xml:lang="es"><![CDATA[Validez del Pulmonary Embolism Rule-Out Criteria (PERC) para descartar embolia pulmonar en pacientes con bajo riesgo a gran altitud]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[BASTIDAS-GOYES]]></surname>
<given-names><![CDATA[ALIRIO RODRIGO]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[REYES-VELASCO]]></surname>
<given-names><![CDATA[LUIS FELIPE]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[RAMOS-ISAZA]]></surname>
<given-names><![CDATA[ESTEFAN]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[RODRÍGUEZ-JIMÉNEZ]]></surname>
<given-names><![CDATA[LAURA MARÍA]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MONDRAGÓN-BRAVO]]></surname>
<given-names><![CDATA[MARÍA LYGIA]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MONZÓN-DUARTE]]></surname>
<given-names><![CDATA[JUAN SEBASTIÁN]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[SCOTTI-D'OVIDIO]]></surname>
<given-names><![CDATA[SALVADOR ALEJANDRO]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[JIMÉNEZ-BRICEÑO]]></surname>
<given-names><![CDATA[NATHALY VANNESA]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[GÓMEZ-ROJAS]]></surname>
<given-names><![CDATA[MARÍA FERNANDA]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[CAMACHO-PALACIOS]]></surname>
<given-names><![CDATA[BOBBY STEFEN]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MORENO-JARAMILLO]]></surname>
<given-names><![CDATA[NATALIA]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[IZQUIERDO-POLANCO]]></surname>
<given-names><![CDATA[JULIANA]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de La Sabana Facultad de Medicina ]]></institution>
<addr-line><![CDATA[Chía ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de La Sabana Facultad de Medicina ]]></institution>
<addr-line><![CDATA[Chía ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de La Sabana  ]]></institution>
<addr-line><![CDATA[Chía ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de la Sabana  ]]></institution>
<addr-line><![CDATA[Chía ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>46</volume>
<numero>4</numero>
<fpage>18</fpage>
<lpage>25</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-24482021000400018&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-24482021000400018&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-24482021000400018&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objectives: to validate the diagnostic yield of the PERC score for ruling out pulmonary embolism in low-risk patients at high altitudes (&gt;2500 meters above sea level [ASL]).  Methods: a cross-sectional study with diagnostic test analysis in patients over the age of 18 with suspected pulmonary embolism on admission or during hospitalization, who underwent chest computed tomography angiography between August 2009 and January 2020 in a tertiary care hospital located on the Bogotá savannah. The yield of the PERC score was assessed, calculated with an SaO2&lt;95% and an SaO2&lt;90% in patients with different risk levels according to the Wells, Geneva and Pisa scores for pulmonary embolism.  Results: one thousand eighty-seven were included in the final analysis, 42% with PE. Patients classified as low-risk using the Wells score had a PERC ACOR calculated with SaO2&lt;95% of 0.56 (95%CI:0.50-0.62) (p=0.049), and calculated with SaO2&lt;90% of 0.60 (95%CI:0.54-0.66) (p=0.002). The ACOR for subjects classified as low-risk using the Geneva score, with a PERC calculated with SaO2&lt;95%, was: 0.53 (95%CI:0.45-0.60) (p=0.459) and for a PERC calculated with SaO2&lt;90% it was: 0.55 (95%CI:0.47-0.62) (P=0.218). The ACOR for subjects with a less than 10% probability of PE according to the Pisa score classification, with a PERC calculated with SaO2&lt;95%, was: 0.54 (95%CI:0.44-0.64)(p=0.422), and for a PERC calculated with SaO2&lt;90% it was: 0.56 (95%CI:0.46-0.66)(p=0.236).  Conclusions: the PERC score calculated with an oxygen saturation &lt;90% has a similar diagnostic yield to the PERC score calculated with an oxygen saturation &lt;95% for ruling out PE in patients classified as low-risk by the Wells score at high altitudes (&gt;2,500 meters ASL). (Acta Med Colomb 2021; 46. DOI:https://doi.org/10.36104/amc.2021.2010).]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivos: validar el rendimiento diagnóstico del puntaje PERC para descartar embolia pulmonar en pacientes de bajo riesgo a gran altitud (&gt;2500 msnm).  Metodología: estudio de corte transversal con análisis de prueba diagnóstica en pacientes mayores de 18 años con sospecha diagnóstica de embolia pulmonar al ingreso o durante la hospitalización llevado a toma de angiotomografía de tórax desde agosto de 2009 hasta enero de 2020 en un centro de tercer nivel ubicado en la Sabana de Bogotá, se evaluó el rendimiento del puntaje PERC (Embolism Rule-Out Criteria) calculado con una SatO2&lt;95% y una SatO2&lt;90% en pacientes con diferentes niveles de riesgo según los puntajes de Wells, Ginebra y Pisa para embolia pulmonar.  Resultados: mil ochenta y siete ingresaron al análisis final, 42% con EP Se encontró para los pacientes clasificados de bajo riesgo por el puntaje de Wells un ACOR para el PERC calculado con SatO2&lt;95% de 0.56 (IC-95%:0.50-0.62) (p=0.049), y para el PERC calculado con SatO2&lt;90% de 0.60 (IC-95%:0.54-0.66) (p=0.002), el ACOR para sujetos clasificados de bajo riesgo por el puntaje de Ginebra con un PERC calculado con SatO2&lt;95% fue de: 0.53 (IC-95%:0.45-0.60) (p=0.459) y para un PERC calculado con SatO2&lt;90% fue de: 0.55 (IC-95%:0.47-0.62) (P=0.218), el ACOR para sujetos clasificados con menos de 10% de probabilidad para EP por el puntaje de Pisa con un PERC calculado con SatO2&lt;95% fue de: 0.54 (IC-95%:0.44-0.64)(p=0.422) y para un PERC calculado con SatO2&lt;90% fue de: 0.56 (IC-95%:0.46-0.66)(p=0.236).  Conclusiones: el puntaje PERC calculado con una saturación de oxígeno &lt;90% tiene un rendimiento diagnóstico similar al puntaje PERC calculado con una saturación de oxígeno &lt;95% para descartar EP en pacientes clasificados en bajo riesgo con puntaje de Wells a gran altitud (&gt;2500 msnm). (Acta Med Colomb 2021; 46. DOI:https://doi.org/10.36104/amc.2021.2010).]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[pulmonary embolism]]></kwd>
<kwd lng="en"><![CDATA[clinical decision rules]]></kwd>
<kwd lng="en"><![CDATA[diagnosis]]></kwd>
<kwd lng="en"><![CDATA[probability]]></kwd>
<kwd lng="en"><![CDATA[altitude and reproducibility of the results]]></kwd>
<kwd lng="es"><![CDATA[embolia pulmonar]]></kwd>
<kwd lng="es"><![CDATA[reglas de decisión clínica]]></kwd>
<kwd lng="es"><![CDATA[diagnóstico]]></kwd>
<kwd lng="es"><![CDATA[probabilidad]]></kwd>
<kwd lng="es"><![CDATA[altitud y reproducibilidad de los resultados]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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